NADP AMNet Standard Operating Procedure Site Report D: Annual/As Needed Maintenance

Transcription

1 NADP AMNet Standard Operating Procedure Site Report D: Annual/As Needed Maintenance

2 For information about the National Atmospheric Deposition Program (NADP) contact: NADP Program Office Illinois State Water Survey University of Illinois at Urbana-Champaign 2204 Griffith Drive Champaign, Illinois URL: phone:

3 Abbreviations AIRMoN Atmospheric Integrated Research Monitoring Network AMNet Atmospheric Mercury Network AMoN Ammonia Monitoring Network CAMD Clean Air Markets Division CAMNET Canadian Atmospheric Mercury Network CASTNET Clean Air Status and Trends Network CVAFS Cold Vapor Atomic Fluorescence Spectroscopy DFU Dry Filter Unit DQO Data Quality Objectives GEM Gaseous Elemental Mercury (expressed in ng/m 3 ) GOM Gaseous Oxidized Mercury (expressed in pg/m 3 ) Hg Mercury, the element ( hydrargyrum ) LPM Liters per Minute LST Local Standard Time MDE Mercury Deposition Event MDN Mercury Deposition Network MSDS Material Safety and Data Sheets NADP National Atmospheric Deposition Program NIST National Institute of Standards and Technology NOAA National Oceanic and Atmospheric Administration NOS Network Operations Subcommittee NTN National Trends Network OSHA Office Safety and Health Administration PBM 2.5 Particle-Bound Mercury less than 2.5 μm in diameter (expressed in pg/m 3 ) PO NADP Program Office QA Quality Assurance QAAG Quality Assurance Advisory Group QC Quality Control QR Quality Rating RF Response Factor RGM Reactive Gaseous Mercury RPF Regenerable Particulate Filter SOP Standard Operating Procedure SQL Structured Query Language TGM Total Gaseous Mercury UHP Ultra High Purity U.S. EPA United States Environmental Protection Agency USGS United States Geological Survey 3

4 Introduction Maintenance activities are required annually for each site in the NADP Atmospheric Mercury Network (AMNet). Near the end of each calendar year, the operator should complete the maintenance activities described in this Standard Operating Procedure (SOP) document, Site Report D: Annual/As Needed Maintenance. Depending on conditions at the site (e.g., relative humidity, line voltage), some maintenance activities may be required more frequently. In such instances, the maintenance activities should be completed on an as needed basis. The activities described in this SOP exam the ambient mercury monitoring system, and ensure that the instrument is free from typical mechanical and operational faults. The SOP and its associated report identify the components that require maintenance, the consumables required as part of the maintenance, and the tools necessary to perform the maintenance. A copy of the annual/as-needed maintenance report is included in the Appendix to this document. The activities associated with the annual/as-needed maintenance require no in-lab preparation. The Report requires confirmation that specific tasks were completed, and the reporting of specific measurements. An X in the Done column indicates the task was performed. The date and time of the period impacted by each task should be indicated in the report. Users are encouraged to use the electronic version of the Report The completed report should be named using the naming scheme RSSSSYYYYMM.xls, where R is the report type (e.g., A, B, C, or D refer to title of the corresponding SOP), SSSS is the 4-charater site ID, YYYY is the 4-digit year, and MM is the 2-digit designation for the month. For example, DVT xls is the annual/as-needed maintenance report that was completed in December 2009 for VT99. A copy of the report should be submitted to the NADP Program Office upon completion of the maintenance activities. The information contained in the report, and in all other reports, is used when validating the data. It is important that all reports are submitted in a timely manner. This SOP is not intended to be a troubleshooting guide. Additional information is available in the user manuals for the instrumentation, the instrument Technical Notes, and from the AMNet site liaison. 4

5 Field Activities Table 1. Annual/As-Needed Equipment Maintenance, Field Activities. Reset or replace 2537 lamp Install new matched pair of gold cartridges Maintenance required Clean or replace 2537 Teflon valves Clean or replace cuvette Service or repair the 2537 pump New UV lamp 2537 pump brushes and diaphragm New matched pair of gold cartridges Consumables required 2537 V2 and V3 valves Reagent grade water Laboratory grade methanol Clean, non-talc gloves Adjustable wrench Flat-head screwdriver Tools required Phillips screwdriver Pliers Allen wrenches Completing the Report Site, Block 1 - Enter the site name and the site ID. Site names are chosen during the site selection and installation process. The site ID is a four-character code that is assigned by the NADP Program Office. 1. Site Name: ID: Operator, Block 2 - Enter the name and initials of the person that performed the maintenance, and to whom questions should directed if there are questions about the report. Three initials should be used, if possible. 2. Operator Name: Initials: 5

6 Date, Block 3 - Enter the date the maintenance was performed, or the date the maintenance was started if maintenance extends multiple days. Enter the date in the form YYYY/MM/DD, where YYYY is the 4-digit year, MM is the numeric designation for the month, and DD is the day of the month. 3. Date (YYYY/MM/DD) Service Options Checklist, Block 4 - Tasks listed at the top of the Report require confirmation that specific tasks were completed. Tasks listed at the bottom of the Report require the reporting of measured values. When a component is replaced, the serial number of the new component should be recorded. D01 D02 D03 D04 D05 D06 D07 D08 D09 D10 D11 4. Service Options Checklist 2537 lamp changed Task Gold cartridges changed New serial number 2537 teflon valves cleaned 2537 teflon valves replaced 2537 cuvette cleaned 2537 cuvette replaced 2537 pump serviced 1130 Heated boot replaced 1130 case heater replaced 1135 case heater replaced Heated sample line rinsed Done Period Impacted (local time, 24 hr) X MM/DD 13:50 MM/DD 15:15 Comments, Actions D12 Independent survey performed Task Value Period Impacted (local time, 24 hr) MM/DD 13:50 MM/DD 15:15 Comments, Actions D13 Swap 2537A New Serial Number D14 Swap 2537A New Cal Hg amount (pg) D15 D16 D17 Swap 1130 Pump Module New Serial Number Swap 1130 Sampling Head New Serial Number Swap 1135 Sampling Head New Serial Number 6

7 2537 Lamp Adjusted or Changed - If lamp voltage exceeds 12.5V, the lamp indicator light on the 2537 front panel will illuminate. Adjust lamp voltage according to Tekran user manual and Tech Note TN Lamp Driver Modification Kit Installation. If you are unable to adjust the lamp and achieve satisfactory operating condition, replace the lamp according to the Tekran user manual and Tech Note TN Gold Cartridges Changed - If either the SPAN or ambient GEM values deviate by more than 15% between the A and B cartridges, the gold cartridges may need to be replaced. Refer to Tekran 2537 user manual for proper gold cartridge replacement procedure. Starting in 2009 Tekran identifies the gold cartridges with serial numbers. Record the serial numbers of the new gold cartridge on the form Teflon Valves Cleaned If channel specific cartridge differences are observed, valves V2 and V3 valves may need to be cleaned. Remove valves and back flush with reagent grade water and methanol. Dry, replace and retest Teflon Valves Replaced - If cleaning the 2537 Teflon valves does not correct the problem, the valves may need to be replaced. AMNet recommends annual replacement of the 2537 V2 and V3 valves. When replacing the valves, do not over tighten the PFA tubing nuts Cuvette Cleaned - Refer to Section Cuvette Cleaning of the Tekran 2537 user manual for the proper procedure Cuvette Replaced - If cleaning the cuvette does not correct the problem, the cuvette may need to be replaced. Refer to the Tekran 2537 user manual for the proper procedure Pump Serviced The model 2537A pump can be serviced. Servicing the pump includes replacing the brushes and diaphragm. Refer to Tekran Tech Note TN : Pump Brushes Replacement Procedure Model 2537 for the proper procedure. The model 2537B cannot be serviced. It should be replaced at the time of failure. Refer to Tekran Tech Note TN : Pump Replacement Procedure Model 2537 for the proper procedure Heater Boot Replaced - If the 1130 elutriator heater does not reach the proper operating temperature, the heater may need to be replaced Case Heater Replaced - If the 1130 case heater is at ambient temperature when in operation, it needs to be replaced Case Heater Replaced - If the 1135 case heater is at ambient temperature when in operation, it needs to be replaced. Heated sample line rinsed - If high blanks are observed and other troubleshooting techniques have been exhausted, the sample line may need to be cleaned. To clean, elevate one end of the line and flush the line with reagent grade water. Follow with a methanol rinse and dry with zero air. 7

8 Independent Survey Performed - An independent site survey should be performed at least once every 2 years. The AMNet Site Liaison will contact the site to schedule the site survey. Swap 2537 New Serial Number - If a second 2537 is available and is installed, record the serial number of the replacement unit. Verify that the scale factors are set properly. Swap 2537 New Cal Amount (pg) - Record the calibration mass of the new instrument. The calibration mass can be found in the calibration summary labeled HgAmt. Separate values are required for both the A and B cartridges. Swap 1130 Pump Module New Serial Number - If a second 1130 Pump Module is available and is installed, record the serial number of the replacement unit. Swap 1130 Sampling Head New Serial Number - If the 1130 sampling head (exterior box) is replaced, record the serial number of the replacement unit. Swap 1135 sampling Head New Serial Number - If the 1135 sampling head (exterior box) is replaced, record the serial number of the replacement unit. Remarks, Block 5 - Enter any additional comments or explanation regarding the quarterly maintenance activities in this block. Please be concise and clear. 8

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